Google's John Mueller explained on Twitter that the Google URL removal tool does not stop Google from crawling the URL, instead it just hides that URL in the search results.
This is actually something we covered in 2003 where we covered "The URL removal tool does not remove URLs from the index, it removes them from our search results. The difference is subtle, but it's a part of the reason why you don't see those submissions affect the indexed URL count."
Here is John's tweet:
No, the removal tool just hides the URLs in search, they still get crawled (& indexed, if allowed) normally. Where/what's stuck? Happy to take a look!
— John ☆.o(≧▽≦)o.☆ (@JohnMu) August 8, 2018
So you can expect the URL to be crawled but also not shown in the search results, at least for as long as the removal process is in affect.
Forum discussion at Twitter.